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DNA molecules store genetic information and allow for self-replicating life. Molecules of DNA can be long and very complex. They always consist of smaller molecules that are made up of nitrogenous bases, phosphate groups, and 5-carbon sugars.

DNA is an example of a complex _______.

 A. 

carbohydrate polymer

 B. 

inorganic molecule

 C. 

organic molecule

 D. 

protein structure